Relay.



PATENTED OCT.,25, 1904. T. A. CASEY.

RELAY.

APPLICATION FILED MAR. 16, 1904.

N0 MODEL.

h I i.

INVENTOR BY 2% A ,V,

ATTORNEY UNITED STATES Patented October 25, 1904.

PATENT OFFICE.

THOMAS A. CASEY, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO MAN- HATTANELECTRICAL SUPPLY COMPANY, A CORPORATION OF NEW JERSEY.

RELAY.

SPECIFICATION forming part of Letters Patent No. 773,195, dated October25, 1904.

Application filed March 16,1904. Serial No. 198,372. (No model.)

T0 on whom, it may concerns Be it known that I, THOMAS A. CAsnY, acitizen of the United States, and a resident of Jerin order to securesatisfactory operation un-.

der varying atmospheric conditions to provide means for the relativeadjustment of the armature and its operating-magnets.

The object of my invention is the provision of mechanism by which thisresult may be attained; and to this end my invention consists in thearrangement and combination of devices which in a preferred form 1 haveillustrated in the drawings and set forth in the appended claims.

In the drawings, Figure 1 is a central longitudinal section of atelegraphic relay embodying my invention. Fig. 2 is an end elevationpartly in section, and Fig. 3 is a partial inverted plan showing theunder side of the relay-support.

Similar reference characters are employed to designate like parts in allthe views.

The armature, contacts, tension-adjusting devices, and binding-screwsare of conventional form and require no detailed descrip tion.

The magnets 1 are at one end movably supported in a frame 2, which isformed with two circular apertures into which the ends of the magnetsloosely fit. The opposite ends of the magnets are rigidly secured to theyoke 3 in the usual manner. I An arm 5, rigidly secured to the yoke 3,is provided with a screw-threaded boss 6 and with a depending extension7, which projects through a slot 8 in the base 9. Slotted plates 11 and12 are fastened to the base 9 above and below the slot 8. The edges ofthe arm 5 extend beyond the edges of the extension 7, and the steps thusformed rest on the upper surface of the plate 11 and furnish a supportfor this end of the magnets. The edges of the extension 7 fit closelyagainst the sides of the slotted plates, and the lower end thereof,which is screw-threaded, carries a washer 14, held in place by the nut15. Secured at one end to the extension 7 and at the other end to theunder side of the base 9 are coil-springs 16, which tend to draw themagnets toward the armature. An adjusting-screw 18 is threaded in theboss 6 on the arm 5, and the inner end of the screw bears against theabutment 19.

By turning the screw 18 to the right the distance between the poles ofthe magnets 1 and the armature will be increased against the tension ofthe springs 16 and by turning the screw in the opposite direction (thesprings holding the screw firmly'against the abutment 19) the distancewill be diminished, the plates lland 12 furnishing not only a firmbearing for the arm 5, but also imparting a true rectilinear movementthereto and forming stops which limit the movement of the magnets andprevent the magnet-poles being carried into contact with the armature.

The springs 16 are in the preferred form of apparatus completelyconcealed under the base-board and in such a position that they cannotbecome jammed in adjusting the magnets.

Having thus shown and described my invention, whatI claim as new, anddesire to secure by Letters Patent, is-

1. The combination in a relay of movablysupported magnets, an armsecured to the magnets, a slot in' the base through which the armprojects, an adjusting-screw threaded in said arm, an abutment for saidscrew and a spring connection between the arm and the base.

2. The combination in a relay of movablysupported magnets, an armsecured to the magnets, a slotted plate carried by the base throughwhich the arm projects and which forms a limiting-stop for the arm, ascrew threaded in said arm, an abutment for said a screw threaded insaid arm and an abutment screw and a sprlng conneetlon between the forthe screw.

arm and the base. 1 1 r I H Mk A. k I). 5. The eomblnatlon In a relay oflnovablyb (A b 5 supported magnets, an arm secured thereto \Vrtncsses: V

and pro eetlng through the base, a spring or .Ron'r. B. Krnnoomq,

springs below the base connected to said arm, 0. H. Horwoon.

